Finally nothing to live for

Today Im on lunch and i get a picture message on instagram from an ex showing my gf on her exs page. Earlier saturday I brought up the fact she hasnt been talking to me for a while as she has been. we used to call every night and until saturday we barely called once a week so i knew something was up. then the last pic showed her on oovoo with her ex when she stated she hated oovoo. for 8 months we dated i spent about 700 dollars on her(I calculated) for her to leave me for a “gangsta”. I told the guy that if she takes her im taking his life. He said he packs but until that bullet kills me Im gonna do my best to kill. I have a friend who hacks and he gave me a zip code so now im waiting. I get on the phone with my gf and she states everything in the past thats happened (but she doesnt hold grudges) and said she wants to just be my friend. After that I felt like the military dont matter, my future is gone, All those 8 months wasted, I just want to die out. I no longer have any goals in life. So why live to keep dealing with crap right? Ill know tomorrow morning. But Im really ready this time to dump the pills or cough syrup down my thoat